I deleted podcasts from s9 folder by accident. ever since then s9 shows music when hooked up to mac but shows no music on player. player freezes when i try to get into a folder. have tried deleting all files and putting new firmware on. don't know how to format s9 on a mac but it say that it is fat32. cowon support is of no help have sent several messages with no luck. if anyone can help me out that would be awesome. i want my s9 back.

You said Mac. You'll need to find a PC, back up any media on it if you can, and reformat. The Mac screws up everything but ipods if they are not ejected properly before unplugging. Your file allocation table is screwed up.